Alesis Quadrasynth - Revision history

MelonadeM at 21:35, 13 October 2025

2025-10-13T21:35:17Z

← Older revision		Revision as of 21:35, 13 October 2025
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	== Synthesis ==		== Synthesis ==
	The QS Composite Synthesis standard is used across every Alesis Quadrasynth and QS line of products, it is comprised of 64 total voices, with each note being able to use up to four. This is comparable to the [[~~Korg ai2~~\|Korg ai²]] in terms of features, and to the [[Roland JV-1080]] in terms of voice count and the voices-per-note figure.		The QS Composite Synthesis standard is used across every Alesis Quadrasynth and QS line of products, it is comprised of 64 total voices, with each note being able to use up to four. This is comparable to the [[:Category:Korg_ai²_devices\|Korg ai²]] in terms of features, and to the [[Roland JV-1080]] in terms of voice count and the voices-per-note figure.

	The filter employed is a non-resonant type similar to the one on the Korg M1 or the Korg 01/W. To compensate for this, on-board waveforms feature multisamples with various resonance levels, which can be assigned to different velocity levels or pitches depending on the patch that is designed.		The filter employed is a non-resonant type similar to the one on the Korg M1 or the Korg 01/W. To compensate for this, on-board waveforms feature multisamples with various resonance levels, which can be assigned to different velocity levels or pitches depending on the patch that is designed.

MelonadeM at 16:33, 13 October 2025

2025-10-13T16:33:50Z

← Older revision		Revision as of 16:33, 13 October 2025
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	\| numpresets = '''Programs:'''<br>128 factory + 128 user<br>'''Mixes:'''<br>100 factory + 100 user		\| numpresets = '''Programs:'''<br>128 factory + 128 user<br>'''Mixes:'''<br>100 factory + 100 user
	\| expansion = 1 × [[Alesis PCMCIA]]		\| expansion = 1 × [[Alesis PCMCIA]]
			\| battery = 3-volt BR2325
			\| power = IEC 3-pin {{IEC 3-pin Icon}} (keyboard)<br>Region-specific<br><br>Alesis 4-pin 9V AC (module)<br>Any region
	\| effects = Variable, see [[#Effects\|effects]].		\| effects = Variable, see [[#Effects\|effects]].
	\| successor = [[Alesis Quadrasynth Plus]]		\| successor = [[Alesis Quadrasynth Plus]]

MelonadeM at 16:57, 29 September 2024

2024-09-29T16:57:15Z

← Older revision		Revision as of 16:57, 29 September 2024
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	{{Infobox module		{{Infobox module
	\| name = Alesis Quadrasynth		\| name = Alesis Quadrasynth
	\| image = {{Photo wanted}}<br>'''Alesis Quadrasynth keyboard'''<br><br>~~{{Photo wanted}}~~<br>'''Alesis Quadrasynth S4 Module'''		\| image = {{Photo wanted}}<br>'''Alesis Quadrasynth keyboard'''<br><br>[[File:Alesis-S4-Front.jpg\|320px]]<br>'''Alesis Quadrasynth S4 Module'''
	\| dimensions = 1220 × 115 × 355 (keyboard)<br>482 × 43 × 150 (module)		\| dimensions = 1220 × 115 × 355 (keyboard)<br>482 × 43 × 150 (module)
	\| keyboard = 76 keys		\| keyboard = 76 keys

MelonadeM at 17:25, 28 September 2024

2024-09-28T17:25:34Z

← Older revision		Revision as of 17:25, 28 September 2024
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	\| maxpoly = 64		\| maxpoly = 64
	\| numparts = 16		\| numparts = 16
	\| numpresets = '''Programs:'''<br>128 factory + 128 user~~<br>~~<br>'''Mixes:'''<br>100 factory + 100 user		\| numpresets = '''Programs:'''<br>128 factory + 128 user<br>'''Mixes:'''<br>100 factory + 100 user
	\| expansion = 1 × [[Alesis PCMCIA]]		\| expansion = 1 × [[Alesis PCMCIA]]
	\| effects = Variable, see [[#Effects\|effects]].		\| effects = Variable, see [[#Effects\|effects]].

MelonadeM at 16:59, 28 September 2024

2024-09-28T16:59:29Z

← Older revision		Revision as of 16:59, 28 September 2024
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	\| successor = [[Alesis Quadrasynth Plus]]		\| successor = [[Alesis Quadrasynth Plus]]
	}}		}}
	The '''Alesis Quadrasynth''' and '''Alesis Quadrasynth S4''' are synthesizers released in 1994 by Alesis. They are the first ~~device~~ to incorporate the "QS Composite Synthesis" synthesis to produce sounds.<ref name="qs-review-MT">[https://www.muzines.co.uk/articles/alesis-quadrasynth/7752# Music Technology, April 1994 - "Alesis Quadrasynth" review, "Hard fax"]</ref> It features a 16 ~~Megabit~~ ROM ~~which features~~ high quality, uncompressed sounds.		The '''Alesis Quadrasynth''' and '''Alesis Quadrasynth S4''' are synthesizers released in 1994 by Alesis. They are the first models to incorporate the "QS Composite Synthesis" synthesis to produce sounds.<ref name="qs-review-MT">[https://www.muzines.co.uk/articles/alesis-quadrasynth/7752# Music Technology, April 1994 - "Alesis Quadrasynth" review, "Hard fax"]</ref> It features a 16 MB Wave ROM, storing high quality uncompressed sounds at 48 kHz.

	The keyboard version features 76 keys with velocity and aftertouch and an amber screen, the module version is 1u tall, full width (19") and is rather light, it also features Alesis ADAT inputs and outputs accessible via optical ports. It could have possibly been used to interface with ADAT equipment of the time. This model and the [[S4 Plus]] also use the 9V AC 4-pin DIN port for power delivery. For more information, please see our [[Power_supplies#Non-standard_AC_power_inputs\|power supplies article]].		The keyboard version features 76 keys with velocity and aftertouch and an amber screen, the module version is 1u tall, full width (19") and is rather light, it also features Alesis ADAT inputs and outputs accessible via optical ports. It could have possibly been used to interface with ADAT equipment of the time. This model and the [[S4 Plus]] also use the 9V AC 4-pin DIN port for power delivery. For more information, please see our [[Power_supplies#Non-standard_AC_power_inputs\|power supplies article]].
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	== Synthesis ==		== Synthesis ==

	The QS Composite Synthesis standard is used across every Alesis Quadrasynth and QS line of products, it is comprised of 64 total voices, with each note being able to use up to four. This is comparable to the [[Korg ai2\|Korg ai²]] in terms of features, and to the [[Roland JV-1080]] in terms of voice count and the voices-per-note figure.		The QS Composite Synthesis standard is used across every Alesis Quadrasynth and QS line of products, it is comprised of 64 total voices, with each note being able to use up to four. This is comparable to the [[Korg ai2\|Korg ai²]] in terms of features, and to the [[Roland JV-1080]] in terms of voice count and the voices-per-note figure.

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	=== Effects ===		=== Effects ===
			All effects information was collected with help from the manuals, as well as emagic's SoundDiver 3.0 software.

	~~All effects information was collected with help from the manuals, as well as emagic's SoundDiver 3.0 software.~~
	==== Configuration #1 - 4 sends, 1 reverb ====		==== Configuration #1 - 4 sends, 1 reverb ====
	4 FX sends are available in this mode - the first three sends each have their own independent pitch unit that controls chorus and/or flanging. Afterwards, each of the 4 sends has their own delays, which can have their own independent delay and feedback time. These can all be routed to the singular reverb unit in this mode, if desired. The pitch mode can all be changed independently, but only the first two delay instances can be changed, while the latter 2 are locked to "Mono Delay"		4 FX sends are available in this mode - the first three sends each have their own independent pitch unit that controls chorus and/or flanging. Afterwards, each of the 4 sends has their own delays, which can have their own independent delay and feedback time. These can all be routed to the singular reverb unit in this mode, if desired. The pitch mode can all be changed independently, but only the first two delay instances can be changed, while the latter 2 are locked to "Mono Delay"
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	=== Behind The Scenes ===		=== Behind The Scenes ===

	According to an interview with Marcus Ryle, one of the ~~synth~~ designers behind the Quadrasynth, he stated he had wanted to create a synthesizer that is simple to understand and edit, but can be quite complex.<ref name="marcus-designing-qs">[https://www.muzines.co.uk/articles/marcus-ryle-designing-the-alesis-quadrasynth/10623# Sound on Sound, June 1993 issue - Marcus Ryle: Designing the Alesis Quadrasynth]</ref> In the article, it's also noted that the reason filters are non-resonant was to achieve a higher polyphony count of 64 voices, and that the design philosophy was largely inspired by the team's prior work on various Oberheim products, like ~~their~~ Matrix 6.		According to an interview with Marcus Ryle, one of the designers behind the Quadrasynth architecture, he stated he had wanted to create a synthesizer that is simple to understand and edit, but can be quite complex.<ref name="marcus-designing-qs">[https://www.muzines.co.uk/articles/marcus-ryle-designing-the-alesis-quadrasynth/10623# Sound on Sound, June 1993 issue - Marcus Ryle: Designing the Alesis Quadrasynth]</ref> In the article, it's also noted that the reason filters are non-resonant was to achieve a higher polyphony count of 64 voices, and that the design philosophy was largely inspired by the team's prior work on various Oberheim products, like the Oberheim Matrix synths, and who have also worked on the SampleCell format.

	It is easy to see some of these aspects in the final product: The bespoke LCD that makes editing easier than it would be on a 2-line unit, the quad knobs that allow for easy sound manipulation, or the variety of modulation options - all cited as ~~sort-of bullet~~ points the team wanted to achieve with their design.		It is easy to see some of these aspects in the final product: The bespoke LCD that makes editing easier than it would be on a 2-line unit, the quad knobs that allow for easy sound manipulation, or the variety of modulation options - all cited as points the team wanted to achieve with their design. Even the design of the Alesis S4 module bears some resemblence to the Oberheim Matrix 1000.

	Much like how they reused technology from their effects unit of the time, Alesis would also end up using many of the sounds they recorded and produced for their drum machine lines of products, like the Alesis D4, as a basis for the kits available on the ~~unit~~.		Much like how they reused technology from their effects unit of the time, Alesis would also end up using many of the sounds they recorded and produced for their drum machine lines of products (like the Alesis D4) as a basis for the kits available on the Quadrasynth.

	=== Terminology ===		=== Terminology ===
			The Quadrasynth line divide their sounds into three different types:
	The Quadrasynth line divide their sounds into ~~two~~ different types:
	* '''Mixes''', which comprise of multiple programs playing concurrently, similar to Combi mode on Korg synthesizers or Performance mode on Roland products.		* '''Mixes''', which comprise of multiple programs playing concurrently, similar to Combi mode on Korg synthesizers or Performance mode on Roland products.
	* '''Programs''', which can comprise of up to four different voices. This is similar to the Prog mode on Korg synths, and the Patch mode on Roland products.		* '''Programs''', which can comprise of up to four different voices. This is similar to the Prog mode on Korg synths, and the Patch mode on Roland products.
			* '''Voices''', which can be assigned a waveform, envelopes, filter cutoff, and so on. Similar to what a "Tone" is on Roland products.

	== Oddities ==		== Oddities ==
	* Using '''CC#0''', also known as Bank change MSB will not change the bank between the user bank and the factory bank. This is fixed for the plus models.		* Using '''CC#0''', also known as Bank change MSB will not change the bank between the user bank and the factory bank. This is fixed for the plus models.
			* You could upgrade from the original model to the plus model via a slot-in card inside the unit, which was way cheaper compared to buying a new synth. This was labeled as a v2.0 upgrade in some publications, as well as in the Plus manuals.
	* You could upgrade from the original model to the plus model via a ~~ROM swap~~, which was way cheaper compared to buying a new synth. This was labeled as a v2.0 upgrade in some publications, as well as in the Plus manuals.		* While the officially released expansion cards will work with any Quadrasynth or QS unit, on these original models you need to copy the card contents into the user memory, wiping out any custom patches or mixes one may have made. This is not the case with any of the later units.
			* While PCMCIA cards were common back then, only specific cards will work with Alesis synths - it requires a specific generation of Linear Flash memory. Normally these synths can only read up to 8 megabits, although with mods it may be able to read beyond that.<ref name="pcmcia">[https://benweaver.info/alesis/# Ben Weaver's info site about PCMCIA cards].</ref> For more information please check the [[Alesis PCMCIA]] article.
	* While the officially released expansion cards will work with any Quadrasynth or QS unit, on these models you ~~would~~ need to copy the card contents into the user memory, wiping out any custom patches or mixes one may have made. This is not the case with any later ~~QS Composite Synthesis device~~.

	* While PCMCIA cards were common back then, only specific cards will work with Alesis synths - it requires a specific generation of Linear Flash memory~~, and it seems like specific Cisco cards will work for this purpose~~. Normally these synths can only read up to 8 megabits, although with mods it may be able to read beyond that.<ref name="pcmcia">[https://benweaver.info/alesis/# Ben Weaver's info site about PCMCIA cards].</ref>

	* Alesis devices of the time employed the use of '''BR2325''' batteries. If replacing a battery, one can instead solder a CR2032 battery holder in its place and use a CR2032 battery inside with no issues. For more information please consult the [[Replacing backup batteries#Alesis QuadraSynth\| replacing backup batteries]] article.		* Alesis devices of the time employed the use of '''BR2325''' batteries. If replacing a battery, one can instead solder a CR2032 battery holder in its place and use a CR2032 battery inside with no issues. For more information please consult the [[Replacing backup batteries#Alesis QuadraSynth\| replacing backup batteries]] article.

	* Although rare, the Quadrasynth can display quasi-error codes. For example, if there is no battery detected (or if the battery failed), it would not boot up, instead displaying a screen with all segments turned on, except the indicators for MIDI channels 1-5 and the MIX program number would read "_3".		* Although rare, the Quadrasynth can display quasi-error codes. For example, if there is no battery detected (or if the battery failed), it would not boot up, instead displaying a screen with all segments turned on, except the indicators for MIDI channels 1-5 and the MIX program number would read "_3".

MelonadeM: pcmcia

2024-09-28T12:03:57Z

pcmcia

← Older revision		Revision as of 12:03, 28 September 2024
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	\| numparts = 16		\| numparts = 16
	\| numpresets = '''Programs:'''<br>128 factory + 128 user<br><br>'''Mixes:'''<br>100 factory + 100 user		\| numpresets = '''Programs:'''<br>128 factory + 128 user<br><br>'''Mixes:'''<br>100 factory + 100 user
			\| expansion = 1 × [[Alesis PCMCIA]]
	\| effects = Variable, see [[#Effects\|effects]].		\| effects = Variable, see [[#Effects\|effects]].
	\| successor = [[Alesis Quadrasynth Plus]]		\| successor = [[Alesis Quadrasynth Plus]]

MelonadeM: removed plus models as i'm migrating this to its own page

2024-09-24T21:20:07Z

removed plus models as i'm migrating this to its own page

← Older revision		Revision as of 21:20, 24 September 2024
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	\| rackunits = 1U, full width (modules only)		\| rackunits = 1U, full width (modules only)
	\| manufacturer = Alesis		\| manufacturer = Alesis
	\| releasedate = 1994~~-1995~~		\| releasedate = 1994
	~~\| standards = [[General MIDI]]<ref name="plusonly" group="infobox">Only available on Quadrasynth Plus Piano and S4 Plus</ref>~~
	\| maxpoly = 64		\| maxpoly = 64
	\| numparts = 16		\| numparts = 16
	\| numpresets = '''Programs:''' ~~128 factory + 128 user (original models)~~<br>~~512~~ factory + 128 user ~~(Plus models)~~<br><br>'''Mixes:''' ~~100 factory + 100 user (original models)~~<br>~~400~~ factory + 100 user ~~(Plus models)~~		\| numpresets = '''Programs:'''<br>128 factory + 128 user<br><br>'''Mixes:'''<br>100 factory + 100 user
	\| effects = Variable, see [[#Effects\|effects]].		\| effects = Variable, see [[#Effects\|effects]].
	\| ~~notes~~ = ~~<references group="infobox" />~~		\| successor = [[Alesis Quadrasynth Plus]]
	}}		}}
	The '''Alesis Quadrasynth''' ~~is a 76-key keyboard synthesizer~~ released in 1994 by Alesis. ~~It is~~ the first device to incorporate the "QS Composite Synthesis" synthesis to produce sounds.<ref name="qs-review-MT">[https://www.muzines.co.uk/articles/alesis-quadrasynth/7752# Music Technology, April 1994 - "Alesis Quadrasynth" review, "Hard fax"]</ref> It features a 16 Megabit ROM which features high quality, uncompressed sounds.		The '''Alesis Quadrasynth''' and '''Alesis Quadrasynth S4''' are synthesizers released in 1994 by Alesis. They are the first device to incorporate the "QS Composite Synthesis" synthesis to produce sounds.<ref name="qs-review-MT">[https://www.muzines.co.uk/articles/alesis-quadrasynth/7752# Music Technology, April 1994 - "Alesis Quadrasynth" review, "Hard fax"]</ref> It features a 16 Megabit ROM which features high quality, uncompressed sounds.

			The keyboard version features 76 keys with velocity and aftertouch and an amber screen, the module version is 1u tall, full width (19") and is rather light, it also features Alesis ADAT inputs and outputs accessible via optical ports. It could have possibly been used to interface with ADAT equipment of the time. This model and the [[S4 Plus]] also use the 9V AC 4-pin DIN port for power delivery. For more information, please see our [[Power_supplies#Non-standard_AC_power_inputs\|power supplies article]].

	The name "Quadrasynth" was likely chosen as they have previously used the "Quadra" moniker for their Quadraverb lines of effect units, but also possibly because there are up to four elements that can make a program, and there are four knobs featured on the front panel that lets you modify parameters with ease.		The name "Quadrasynth" was likely chosen as they have previously used the "Quadra" moniker for their Quadraverb lines of effect units, but also possibly because there are up to four elements that can make a program, and there are four knobs featured on the front panel that lets you modify parameters with ease.
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	==== Configuration #1 - 4 sends, 1 reverb ====		==== Configuration #1 - 4 sends, 1 reverb ====
	4 FX sends are available in this mode - the first three sends each have their own independent pitch unit that controls chorus and/or flanging. Afterwards, each of the 4 sends has their own delays, which can have their own independent delay and feedback time. These can all be routed to the singular reverb unit in this mode, if desired. The pitch mode can all be changed independently, but only the first two delay instances can be changed, while the latter 2 are locked to "Mono Delay"		4 FX sends are available in this mode - the first three sends each have their own independent pitch unit that controls chorus and/or flanging. Afterwards, each of the 4 sends has their own delays, which can have their own independent delay and feedback time. These can all be routed to the singular reverb unit in this mode, if desired. The pitch mode can all be changed independently, but only the first two delay instances can be changed, while the latter 2 are locked to "Mono Delay"

	On the Plus models, the third pitch unit is hard locked to a "resonator mode" for this algorithm. This concession was made to provide higher fidelity for the other effects in this configuration.<ref name="qsplus-effect-change">Alesis Quadrasynth S4 Plus manual, page 145 - "Effect Configurations 1 and 3, Send 3 Pitch"</ref>

	==== Configuration #2 - 4 sends, 2 reverbs ====		==== Configuration #2 - 4 sends, 2 reverbs ====
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	==== Configuration #3 - 4 sends, 1 lezlie (sic) ====		==== Configuration #3 - 4 sends, 1 lezlie (sic) ====
	4 FX sends are available in this mode - it is set up similarly to Configuration #1, however the first pitch unit is replaced with a Leslie simulation.		4 FX sends are available in this mode - it is set up similarly to Configuration #1, however the first pitch unit is replaced with a Leslie simulation.

	On the Plus models, the third pitch unit is hard locked to a "resonator mode" for this algorithm. This concession was made to provide higher fidelity for the other effects in this configuration.<ref name="qsplus-effect-change"/>

	==== Configuration #4 - 2 sends, with EQ ====		==== Configuration #4 - 2 sends, with EQ ====
	2 FX sends are avaliable in this mode - each going through one pitch unit, and then one delay unit - fully modifiable. Both get summed up into a reverb, which is also fully modifiable, which then gets output to a 2-band shelving EQ.		2 FX sends are avaliable in this mode - each going through one pitch unit, and then one delay unit - fully modifiable. Both get summed up into a reverb, which is also fully modifiable, which then gets output to a 2-band shelving EQ.

	~~==== Configuration #5 (only available on Plus models) - Overdrive > Chorus > Delay > Reverb > Leslie ====~~
	4 FX sends are available, but only FX1 gets access to the overdrive module - introduced in the Quadrasynth plus series. All the modules here are fully editable, and with exception to Overdrive can all be routed to any effect send (but not multiple). Terminates with an equalizer module.

	=== Behind The Scenes ===		=== Behind The Scenes ===
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	* '''Mixes''', which comprise of multiple programs playing concurrently, similar to Combi mode on Korg synthesizers or Performance mode on Roland products.		* '''Mixes''', which comprise of multiple programs playing concurrently, similar to Combi mode on Korg synthesizers or Performance mode on Roland products.
	* '''Programs''', which can comprise of up to four different voices. This is similar to the Prog mode on Korg synths, and the Patch mode on Roland products.		* '''Programs''', which can comprise of up to four different voices. This is similar to the Prog mode on Korg synths, and the Patch mode on Roland products.

	~~== Alesis Quadrasynth S4 ==~~
	~~This is a rackmount version of the Quadrasynth, released in 1994.~~
	It is contained in a similar chassis to their effect units (notably the Quadraverb 2 even features a similar looking screen). Unlike the keyboard's orange-tinted backlight, the module version features a green backlight instead.
	In addition to the standard complement of I/O, the S4 and S4 Plus feature Alesis ADAT inputs and outputs accessible via optical ports. It could have possibly been used to interface with ADAT equipment of the time. This model and the S4 Plus also use the 9V AC 4-pin DIN port for power delivery. For more information, please see our [[Power_supplies#Non-standard_AC_power_inputs\|power supplies article]].

	~~== Alesis Quadrasynth Plus Piano ==~~
	This is an upgraded version of the keyboard model, released in 1995, adding a further 3 banks of non-editable presets and mixes, which include a [[General MIDI]] bank and mode. The latter is selectable from the settings, although a GM Reset SysEX message will also set the synth up appropriately. It also expands the effects section to be comparable to that of the Alesis Quadraverb Q2's, and adds a further 8 megabits of ROM for various new types of sound, as well as a new piano. Some sounds have been added to existing voice groups, but for the most part two new voice groups have been created - "QSPlus" and "Rhythm"<ref>Alesis Quadrasynth Plus manual, page 37 - "Overview - Chapter 4".</ref> The v2.0 firmware also adds a few new smaller features, like a new Random LFO selection that is unipolar, and also implements bank switching via MIDI CC#0.<ref>Alesis Quadrasynth S4 Plus manual, pages 135 onwards - "WHAT’S NEW IN THE 2.0 "PLUS" UPGRADE"</ref>

	The demo tracks have been replaced as well, three new tracks and a shorter version of Bach's Bad Dream is available, albeit it seems to set the pitch bend ranges for the square lead errorenously. It is unknown if these new tracks have any names or who composed them at this time however it is likely the same person who sequenced the original two demo tracks, Stephen Kay.

	Beyond firmware, the keyboard body has been recoloured from gray to black. It and the module would also include a software called Sound Bridge, which could interface with a PCMCIA card to upload extra samples. Notably, it could load SampleCell formatted files as well.<ref name="qsplus-additions">[https://www.soundonsound.com/reviews/alesis-quadrasynth-plus# Sound on Sound, November 1995 issue].</ref><ref>Alesis Quadrasynth S4 Plus manual, page 10 - "A word about Sound Bridge"</ref> These cards could also be used to store extra programs and mixes if desired.

	~~== Alesis Quadrasynth S4 Plus ==~~
	[[File:Alesis-s4-plus-vector.jpg\|315px\|thumb\|right\|Illustration of the Alesis S4 Plus, based on a version found in the manual with added colour.]] Released in 1996, this is a rackmount version of the Quadrasynth Plus Piano, except it omits the extra piano sounds, for a total of 20 megabits of sample ROM. Software-wise, it is identical in all other respects. The QSPlus bank has been renamed to S4Plus.

	The rackmount body itself features a few changes: "EXPANDED ROM - GENERAL MIDI" text can be found below the 8 buttons on the left, a bracket below the PAGE pair of buttons indicate that these can also increment or decrement a value by 10, the VALUE pair of buttons have a similar bracket, but for incrementing or decrementing by 1, and the logo has a fancy "Plus" handwritten on top of the logo.

	== Oddities ==		== Oddities ==
	* On the ~~original and the S4 models, using~~ the bank ~~CCs would not change~~ the ~~current~~ bank. This ~~was~~ fixed for the plus ~~releases~~.		* Using '''CC#0''', also known as Bank change MSB will not change the bank between the user bank and the factory bank. This is fixed for the plus models.

	* You could upgrade from the original model to the plus model via a ROM swap, which was way cheaper compared to buying a new synth. This was labeled as a v2.0 upgrade in some publications, as well as in the Plus manuals.		* You could upgrade from the original model to the plus model via a ROM swap, which was way cheaper compared to buying a new synth. This was labeled as a v2.0 upgrade in some publications, as well as in the Plus manuals.

	* While the officially released expansion cards will work with any Quadrasynth or QS unit, on ~~the original non-plus~~ models you would need to copy the card contents into the user memory, wiping out any custom patches or mixes one may have made. This is not the case with ~~the plus models or~~ any ~~of the~~ QS ~~synths~~.		* While the officially released expansion cards will work with any Quadrasynth or QS unit, on these models you would need to copy the card contents into the user memory, wiping out any custom patches or mixes one may have made. This is not the case with any later QS Composite Synthesis device.

	* While PCMCIA cards were common back then, only specific cards will work with Alesis synths - it requires a specific generation of Linear Flash memory, and it seems like specific Cisco cards will work for this purpose. Normally these synths can only read up to 8 megabits, although with mods it may be able to read beyond that.<ref name="pcmcia">[https://benweaver.info/alesis/# Ben Weaver's info site about PCMCIA cards].</ref>		* While PCMCIA cards were common back then, only specific cards will work with Alesis synths - it requires a specific generation of Linear Flash memory, and it seems like specific Cisco cards will work for this purpose. Normally these synths can only read up to 8 megabits, although with mods it may be able to read beyond that.<ref name="pcmcia">[https://benweaver.info/alesis/# Ben Weaver's info site about PCMCIA cards].</ref>
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	<references />		<references />
			[[Category:Alesis Quadrasynth devices]]
	[[Category:~~General MIDI~~ devices]]

Hikari no yume: Add {{Photo wanted}}

2024-09-22T16:21:53Z

Add {{Photo wanted}}

← Older revision		Revision as of 16:21, 22 September 2024
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	{{Infobox module		{{Infobox module
	\| name = Alesis Quadrasynth		\| name = Alesis Quadrasynth
	\| image = ~~[[File:Coolguy.png]]~~<br>'''Alesis Quadrasynth keyboard'''<br><br>~~[[File:Coolguy.png]]~~<br>'''Alesis Quadrasynth S4 Module'''		\| image = {{Photo wanted}}<br>'''Alesis Quadrasynth keyboard'''<br><br>{{Photo wanted}}<br>'''Alesis Quadrasynth S4 Module'''
	\| dimensions = 1220 × 115 × 355 (keyboard)<br>482 × 43 × 150 (module)		\| dimensions = 1220 × 115 × 355 (keyboard)<br>482 × 43 × 150 (module)
	\| keyboard = 76 keys		\| keyboard = 76 keys

MelonadeM: added keys and weight to infobox

2024-08-30T19:29:08Z

added keys and weight to infobox

← Older revision		Revision as of 19:29, 30 August 2024
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	{{Infobox module		{{Infobox module
	\| name = Alesis Quadrasynth		\| name = Alesis Quadrasynth
	\| image = ~~'''THESE ARE PLACEHOLDER...'''<br>~~[[File:~~Roland-SC8850-Front~~.~~jpg\|320px~~]]<br>Alesis Quadrasynth keyboard<br><br>[[File:~~Roland-SC8850-Front~~.~~jpg\|320px~~]]<br>Alesis Quadrasynth S4 Module		\| image = [[File:Coolguy.png]]<br>'''Alesis Quadrasynth keyboard'''<br><br>[[File:Coolguy.png]]<br>'''Alesis Quadrasynth S4 Module'''
	\| dimensions = 1220 × 115 × 355 (keyboard)<br>482 × 43 × 150 (module)		\| dimensions = 1220 × 115 × 355 (keyboard)<br>482 × 43 × 150 (module)
			\| keyboard = 76 keys
			\| weight = 13.6kg (keyboard)<br>~2kg (module)
	\| rackunits = 1U, full width (modules only)		\| rackunits = 1U, full width (modules only)
	\| manufacturer = Alesis		\| manufacturer = Alesis

MelonadeM: minor adjustments, further effect clarification for plus models

2024-08-29T20:37:28Z

minor adjustments, further effect clarification for plus models

← Older revision		Revision as of 20:37, 29 August 2024
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	\| notes = <references group="infobox" />		\| notes = <references group="infobox" />
	}}		}}
	The '''Alesis Quadrasynth''' is a 76-key keyboard synthesizer released in 1994 by Alesis. It is the first device to incorporate the "QS Composite Synthesis" synthesis to produce sounds.<ref name="qs-review-MT">[https://www.muzines.co.uk/articles/alesis-quadrasynth/7752# ~~Alesis Quadrasynth review from~~ Music Technology, April 1994 ~~(under the~~ "Hard fax" ~~section)~~]</ref> It features a 16 Megabit ROM which features high quality, uncompressed sounds.		The '''Alesis Quadrasynth''' is a 76-key keyboard synthesizer released in 1994 by Alesis. It is the first device to incorporate the "QS Composite Synthesis" synthesis to produce sounds.<ref name="qs-review-MT">[https://www.muzines.co.uk/articles/alesis-quadrasynth/7752# Music Technology, April 1994 - "Alesis Quadrasynth" review, "Hard fax"]</ref> It features a 16 Megabit ROM which features high quality, uncompressed sounds.

	The name "Quadrasynth" was likely chosen as they have previously used the "Quadra" moniker for their Quadraverb lines of effect units, but also possibly because there are up to four elements that can make a program, and there are four knobs featured on the front panel that lets you modify parameters with ease.		The name "Quadrasynth" was likely chosen as they have previously used the "Quadra" moniker for their Quadraverb lines of effect units, but also possibly because there are up to four elements that can make a program, and there are four knobs featured on the front panel that lets you modify parameters with ease.
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	The keyboard version features in addition to these a complement of sustain and expression pedal inputs, which are missing from the module version as they are irrelevant there.		The keyboard version features in addition to these a complement of sustain and expression pedal inputs, which are missing from the module version as they are irrelevant there.

	The Quadrasynth and S4 modules shipped with two built-in demo songs - "Cyberfunk" and "Bach's Bad Dream (with apologies to J.S. Bach's Prelude in Am)", both sequenced by Stephen Kay.<ref>Alesis S4 Manual, page 12 - "Playing the Demo Sequence"</ref>		The Quadrasynth and S4 modules shipped with two built-in demo songs - "Cyberfunk" and "Bach's Bad Dream (with apologies to J.S. Bach's Prelude in Am)", both sequenced by Stephen Kay.<ref>Alesis Quadrasynth S4 Manual, page 12 - "Playing the Demo Sequence"</ref>

	== Synthesis ==		== Synthesis ==
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	==== Configuration #1 - 4 sends, 1 reverb ====		==== Configuration #1 - 4 sends, 1 reverb ====
	4 FX sends are available in this mode - the first three sends each have their own independent pitch unit that controls chorus and/or flanging. Afterwards, each of the 4 sends has their own delays, which can have their own independent delay and feedback time. These can all be routed to the singular reverb unit in this mode, if desired. The pitch mode can all be changed independently, but only the first two delay instances can be changed, while the latter 2 are locked to "Mono Delay"		4 FX sends are available in this mode - the first three sends each have their own independent pitch unit that controls chorus and/or flanging. Afterwards, each of the 4 sends has their own delays, which can have their own independent delay and feedback time. These can all be routed to the singular reverb unit in this mode, if desired. The pitch mode can all be changed independently, but only the first two delay instances can be changed, while the latter 2 are locked to "Mono Delay"

			On the Plus models, the third pitch unit is hard locked to a "resonator mode" for this algorithm. This concession was made to provide higher fidelity for the other effects in this configuration.<ref name="qsplus-effect-change">Alesis Quadrasynth S4 Plus manual, page 145 - "Effect Configurations 1 and 3, Send 3 Pitch"</ref>

	==== Configuration #2 - 4 sends, 2 reverbs ====		==== Configuration #2 - 4 sends, 2 reverbs ====
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	==== Configuration #3 - 4 sends, 1 lezlie (sic) ====		==== Configuration #3 - 4 sends, 1 lezlie (sic) ====
	4 FX sends are available in this mode - it is set up similarly to Configuration #1, however the first pitch unit is replaced with a Leslie simulation.		4 FX sends are available in this mode - it is set up similarly to Configuration #1, however the first pitch unit is replaced with a Leslie simulation.

			On the Plus models, the third pitch unit is hard locked to a "resonator mode" for this algorithm. This concession was made to provide higher fidelity for the other effects in this configuration.<ref name="qsplus-effect-change"/>

	==== Configuration #4 - 2 sends, with EQ ====		==== Configuration #4 - 2 sends, with EQ ====
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	=== Behind The Scenes ===		=== Behind The Scenes ===

	According to an interview with Marcus Ryle, one of the synth designers behind the Quadrasynth, he stated he had wanted to create a synthesizer that is simple to understand and edit, but can be quite complex.<ref name="marcus-designing-qs">[https://www.muzines.co.uk/articles/marcus-ryle-designing-the-alesis-quadrasynth/10623# Sound on Sound June 1993 issue, Marcus Ryle: Designing the Alesis Quadrasynth]</ref> In the article, it's also noted that the reason filters are non-resonant was to achieve a higher polyphony count of 64 voices, and that the design philosophy was largely inspired by the team's prior work on various Oberheim products, like their Matrix 6.		According to an interview with Marcus Ryle, one of the synth designers behind the Quadrasynth, he stated he had wanted to create a synthesizer that is simple to understand and edit, but can be quite complex.<ref name="marcus-designing-qs">[https://www.muzines.co.uk/articles/marcus-ryle-designing-the-alesis-quadrasynth/10623# Sound on Sound, June 1993 issue - Marcus Ryle: Designing the Alesis Quadrasynth]</ref> In the article, it's also noted that the reason filters are non-resonant was to achieve a higher polyphony count of 64 voices, and that the design philosophy was largely inspired by the team's prior work on various Oberheim products, like their Matrix 6.

	It is easy to see some of these aspects in the final product: The bespoke LCD that makes editing easier than it would be on a 2-line unit, the quad knobs that allow for easy sound manipulation, or the variety of modulation options - all cited as sort-of bullet points the team wanted to achieve with their design.		It is easy to see some of these aspects in the final product: The bespoke LCD that makes editing easier than it would be on a 2-line unit, the quad knobs that allow for easy sound manipulation, or the variety of modulation options - all cited as sort-of bullet points the team wanted to achieve with their design.
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	== Alesis Quadrasynth Plus Piano ==		== Alesis Quadrasynth Plus Piano ==
	This is an upgraded version of the keyboard model, released in 1995, adding a further 3 banks of non-editable presets and mixes, which include a [[General MIDI]] bank and mode. The latter is selectable from the settings, although a GM Reset SysEX message will also set the synth up appropriately. It also expands the effects section to be comparable to that of the Alesis Quadraverb Q2's, and adds a further 8 megabits of ROM for various new types of sound, as well as a new piano. Some sounds have been added to existing voice groups, but for the most part two new voice groups have been created - "QSPlus" and "Rhythm"<ref>Alesis Quadrasynth Plus manual, page 37 - "Overview - Chapter 4".</ref> The v2.0 firmware also adds a few new smaller features, like a new Random LFO selection that is unipolar, and also implements bank switching via MIDI CC#0.<ref>Alesis S4 Plus manual, pages 135 onwards - "WHAT’S NEW IN THE 2.0 "PLUS" UPGRADE"</ref>		This is an upgraded version of the keyboard model, released in 1995, adding a further 3 banks of non-editable presets and mixes, which include a [[General MIDI]] bank and mode. The latter is selectable from the settings, although a GM Reset SysEX message will also set the synth up appropriately. It also expands the effects section to be comparable to that of the Alesis Quadraverb Q2's, and adds a further 8 megabits of ROM for various new types of sound, as well as a new piano. Some sounds have been added to existing voice groups, but for the most part two new voice groups have been created - "QSPlus" and "Rhythm"<ref>Alesis Quadrasynth Plus manual, page 37 - "Overview - Chapter 4".</ref> The v2.0 firmware also adds a few new smaller features, like a new Random LFO selection that is unipolar, and also implements bank switching via MIDI CC#0.<ref>Alesis Quadrasynth S4 Plus manual, pages 135 onwards - "WHAT’S NEW IN THE 2.0 "PLUS" UPGRADE"</ref>

	The demo tracks have been replaced as well, three new tracks and a shorter version of Bach's Bad Dream is available, albeit it seems to set the pitch bend ranges for the square lead errorenously. It is unknown if these new tracks have any names or who composed them at this time however it is likely the same person who sequenced the original two demo tracks, Stephen Kay.		The demo tracks have been replaced as well, three new tracks and a shorter version of Bach's Bad Dream is available, albeit it seems to set the pitch bend ranges for the square lead errorenously. It is unknown if these new tracks have any names or who composed them at this time however it is likely the same person who sequenced the original two demo tracks, Stephen Kay.

	Beyond firmware, the keyboard body has been recoloured from gray to black. It and the module would also include a software called Sound Bridge, which could interface with a PCMCIA card to upload extra samples. Notably, it could load SampleCell formatted files as well.<ref name="qsplus-additions">[https://www.soundonsound.com/reviews/alesis-quadrasynth-plus# Sound on Sound, November 1995 issue].</ref><ref>Alesis S4 Plus manual, page 10 - "A word about Sound Bridge"</ref> These cards could also be used to store extra programs and mixes if desired.		Beyond firmware, the keyboard body has been recoloured from gray to black. It and the module would also include a software called Sound Bridge, which could interface with a PCMCIA card to upload extra samples. Notably, it could load SampleCell formatted files as well.<ref name="qsplus-additions">[https://www.soundonsound.com/reviews/alesis-quadrasynth-plus# Sound on Sound, November 1995 issue].</ref><ref>Alesis Quadrasynth S4 Plus manual, page 10 - "A word about Sound Bridge"</ref> These cards could also be used to store extra programs and mixes if desired.

	== Alesis Quadrasynth S4 Plus ==		== Alesis Quadrasynth S4 Plus ==
	Released in 1996, this is a rackmount version of the Quadrasynth Plus Piano, except it omits the extra piano sounds, for a total of 20 megabits of sample ROM. Software-wise, it is identical in all other respects. The QSPlus bank has been renamed to S4Plus.		[[File:Alesis-s4-plus-vector.jpg\|315px\|thumb\|right\|Illustration of the Alesis S4 Plus, based on a version found in the manual with added colour.]] Released in 1996, this is a rackmount version of the Quadrasynth Plus Piano, except it omits the extra piano sounds, for a total of 20 megabits of sample ROM. Software-wise, it is identical in all other respects. The QSPlus bank has been renamed to S4Plus.
	~~[[File:Alesis-s4-plus-vector.jpg\|315px\|thumb\|right\|Illustration of the Alesis S4 Plus, based on a version found in the manual with added colour.]]~~

	The rackmount body itself features a few changes: "EXPANDED ROM - GENERAL MIDI" text can be found below the 8 buttons on the left, a bracket below the PAGE pair of buttons indicate that these can also increment or decrement a value by 10, the VALUE pair of buttons have a similar bracket, but for incrementing or decrementing by 1, and the logo has a fancy "Plus" handwritten on top of the logo.		The rackmount body itself features a few changes: "EXPANDED ROM - GENERAL MIDI" text can be found below the 8 buttons on the left, a bracket below the PAGE pair of buttons indicate that these can also increment or decrement a value by 10, the VALUE pair of buttons have a similar bracket, but for incrementing or decrementing by 1, and the logo has a fancy "Plus" handwritten on top of the logo.